Put the laptop space bar back in?

I wanted to clean my keyboard this early in the morning and I snapped them out with a paper clip and cleaned them, etc. There were difficulties with the space bar and somehow I can't use it. In the picture you can see the individual parts, etc. See.

Help would be nice and thanks for the answers in advance.

A nupsi broke off the inner part of the scissors below. It's going to be hard to put it back together like that.

But in itself it's pretty simple. Put the scissors together, hook the pins on the board and clip the keycap onto it.

Could you explain the individual technical terms to me, i.e. Scissors etc., I'm not very familiar with hardware.

These are scissor switches or in English scissor switches. They are made up of an inner and an outer part. Ka, what should I explain there.